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Posted by Denis Borris on 22/9/2009, 5:28 pm, in reply to "Re: after 2nd coffee...."
The Plan:
1: Bob starts with door1 ; if not car:
2: Bob takes door2 if door1=key, door3 if door1 = goat
Alice baby:
- will go to door1; then she'll know if Bob needed to go farther than door1
- if door1=car, then she has a 50% chance
- if door1<>car, then she knows car is door2 or 3
- if she gets key at door 1, winner!
- if not, then she knows Bob saw the goat ar door1, so went to door3 and got car
- so she knows key is door2
Howzz dat?
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